0cde55a411
unions, and enums are, in fact, identical. This is done by tagging each of unnamed and untyped structure, union and enum with a unique position of creation, which is used as a unique identifier that when determine whether or not a pair of structures, unions, or enums are identical.
188 lines
6.3 KiB
C
188 lines
6.3 KiB
C
/* $NetBSD: lint2.h,v 1.3 1996/12/22 11:31:10 cgd Exp $ */
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/*
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* Copyright (c) 1996 Christopher G. Demetriou. All Rights Reserved.
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* Copyright (c) 1994, 1995 Jochen Pohl
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* All Rights Reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Jochen Pohl for
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* The NetBSD Project.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "lint.h"
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/*
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* Types are described by structures of type type_t.
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*/
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typedef struct type {
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tspec_t t_tspec; /* type specifier */
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u_int t_const : 1; /* constant */
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u_int t_volatile : 1; /* volatile */
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u_int t_vararg : 1; /* function has variable number of arguments */
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u_int t_isenum : 1; /* enum type */
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u_int t_proto : 1; /* this is a prototype */
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u_int t_istag : 1; /* tag with _t_tag valid */
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u_int t_istynam : 1; /* tag with _t_tynam valid */
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u_int t_isuniqpos : 1; /* tag with _t_uniqpos valid */
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union {
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int _t_dim; /* if the type is an ARRAY than this
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is the dimension of the array. */
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struct hte *_t_tag; /* hash table entry of tag if
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t_isenum, STRUCT or UNION */
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struct hte *_t_tynam; /* hash table entry of typename if
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t_isenum, STRUCT or UNION */
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struct {
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int p_line;
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short p_file;
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int p_uniq;
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} _t_uniqpos; /* unique position, for untagged
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untyped STRUCTs, UNIONS, and ENUMs,
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if t_isuniqpos */
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struct type **_t_args; /* list of argument types if this
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is a prototype */
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} t_u;
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struct type *t_subt; /* indirected type (array element, pointed to
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type, type of return value) */
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} type_t;
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#define t_dim t_u._t_dim
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#define t_tag t_u._t_tag
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#define t_tynam t_u._t_tynam
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#define t_uniqpos t_u._t_uniqpos
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#define t_args t_u._t_args
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/*
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* argument information
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*
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* Such a structure is created for each argument of a function call
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* which is an integer constant or a constant string.
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*/
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typedef struct arginf {
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int a_num; /* # of argument (1..) */
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u_int a_zero : 1; /* argument is 0 */
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u_int a_pcon : 1; /* msb of argument is not set */
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u_int a_ncon : 1; /* msb of argument is set */
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u_int a_fmt : 1; /* a_fstrg points to format string */
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char *a_fstrg; /* format string */
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struct arginf *a_nxt; /* information for next const. argument */
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} arginf_t;
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/*
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* Keeps information about position in source file.
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*/
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typedef struct {
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u_short p_src; /* index of name of translation unit
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(the name which was specified at the
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command line) */
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u_short p_line; /* line number in p_src */
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u_short p_isrc; /* index of (included) file */
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u_short p_iline; /* line number in p_iline */
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} pos_t;
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/*
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* Used for definitions and declarations
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*
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* To save memory, variable sized structures are used. If
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* all s_va, s_prfl and s_scfl are not set, the memory allocated
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* for a symbol is only large enough to keep the first member of
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* struct sym, s_s.
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*/
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typedef struct sym {
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struct {
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pos_t s_pos; /* pos of def./decl. */
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#ifndef lint
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u_int s_def : 3; /* DECL, TDEF or DEF */
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#else
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def_t s_def;
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#endif
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u_int s_rval : 1; /* function has return value */
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u_int s_osdef : 1; /* old style function definition */
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u_int s_static : 1; /* symbol is static */
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u_int s_va : 1; /* check only first s_nva arguments */
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u_int s_prfl : 1; /* printflike */
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u_int s_scfl : 1; /* scanflike */
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u_short s_type; /* type */
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struct sym *s_nxt; /* next symbol with same name */
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} s_s;
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short s_nva;
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short s_nprfl;
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short s_nscfl;
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} sym_t;
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#define s_pos s_s.s_pos
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#define s_rval s_s.s_rval
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#define s_osdef s_s.s_osdef
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#define s_static s_s.s_static
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#define s_def s_s.s_def
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#define s_va s_s.s_va
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#define s_prfl s_s.s_prfl
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#define s_scfl s_s.s_scfl
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#define s_type s_s.s_type
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#define s_nxt s_s.s_nxt
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/*
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* Used to store informations about function calls.
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*/
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typedef struct fcall {
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pos_t f_pos; /* position of call */
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u_int f_rused : 1; /* return value used */
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u_int f_rdisc : 1; /* return value discarded (casted to void) */
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u_short f_type; /* types of expected return value and args */
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arginf_t *f_args; /* information about constant arguments */
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struct fcall *f_nxt; /* next call of same function */
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} fcall_t;
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/*
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* Used to store information about usage of symbols other
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* than for function calls.
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*/
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typedef struct usym {
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pos_t u_pos; /* position */
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struct usym *u_nxt; /* next usage */
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} usym_t;
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/*
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* hash table entry
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*/
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typedef struct hte {
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const char *h_name; /* name */
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u_int h_used : 1; /* symbol is used */
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u_int h_def : 1; /* symbol is defined */
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u_int h_static : 1; /* static symbol */
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sym_t *h_syms; /* declarations and definitions */
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sym_t **h_lsym; /* points to s_nxt of last decl./def. */
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fcall_t *h_calls; /* function calls */
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fcall_t **h_lcall; /* points to f_nxt of last call */
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usym_t *h_usyms; /* usage info */
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usym_t **h_lusym; /* points to u_nxt of last usage info */
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struct hte *h_link; /* next hte with same hash function */
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} hte_t;
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/* maps type indices into pointers to type structs */
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#define TP(idx) (tlst[idx])
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#include "externs2.h"
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